Cisco Systems AS5850 Manual De Usuario
9
Cisco AS5850 Universal Gateway Regulatory Compliance and Safety Information
OL-10265-01
Card Safety Recommendations
Card Safety Recommendations
You must follow these safety instructions when installing any card in a Cisco AS5850. Failure to install
cards in accordance with these instructions invalidates the approval.
cards in accordance with these instructions invalidates the approval.
•
The card might contain safety extra-low voltage (SELV) circuitry. Ensure that attachments at the
interconnection ports of the apparatus are also SELV circuits. (SELV circuits are designed and
protected so that, under both normal conditions and likely fault conditions, the voltage that can be
drawn is not hazardous.)
interconnection ports of the apparatus are also SELV circuits. (SELV circuits are designed and
protected so that, under both normal conditions and likely fault conditions, the voltage that can be
drawn is not hazardous.)
•
Do not work on the system or connect and disconnect cables during a lightning storm.
Warning
This equipment is intended to be grounded. Ensure that the host is connected to earth ground during
normal use. To see translations of this warning, refer to the
normal use. To see translations of this warning, refer to the
If you do not know how to safely install a system component correctly in a Cisco AS5850, contact a
qualified telecommunications engineer.
qualified telecommunications engineer.
General Installation Requirements
This section describes the general installation requirements for any feature card installed in a
Cisco AS5850.
Cisco AS5850.
Where applicable, each trunk card and port card is approved only for installation in a host and with host
attachments, which are either type approved for such apparatus or covered by a General Approval.
Clearance and creepage distances of X millimeters (mm) and Y mm, as listed in
attachments, which are either type approved for such apparatus or covered by a General Approval.
Clearance and creepage distances of X millimeters (mm) and Y mm, as listed in
, must be
maintained between the feature card and other parts of the host, including any other feature cards.
Creepage distance is defined as the minimum distance between two points (following the contour of the
insulator) measured across the surface of an insulator. Clearance distance is defined as the minimum
distance between two points (line of sight) measured in air.
insulator) measured across the surface of an insulator. Clearance distance is defined as the minimum
distance between two points (line of sight) measured in air.
.
Table 2
Creepage and Clearance Distances Based on Voltage
Voltage Used or Generated by Other Parts of the Host
or Feature Card (Vrms
or Feature Card (Vrms
1
or VDC
2
)
1.
Vrms = root mean square voltage.
2.
VDC = volts direct current.
Creepage (Y mm)
3
3.
The creepage distances not in parentheses apply when the equipment is installed in a normal office environment. The
larger dimensions, given in parentheses, must be applied when the equipment is installed in an environment in which
dust and other types of pollution could conduct electricity because of the effects of dampness and condensation. This
applies to locations subject to high humidity.
larger dimensions, given in parentheses, must be applied when the equipment is installed in an environment in which
dust and other types of pollution could conduct electricity because of the effects of dampness and condensation. This
applies to locations subject to high humidity.
Clearance (X mm)
Up to 50
2.4 (3.8)
2.0
Up to 125
3.0 (4.8)
2.6
Up to 250
5.0 (8.0)
4.0
Up to 300
4
4.
For working voltages exceeding 300V, consult a competent telecommunications engineer prior to installation.
6.4 (10.0)
4.0